Electric heating device.



J. U. DIMMICK. ELECTRIC HEATING DEVICE. APPLICATION FILED sums, 1912.

1,047,004. Patented Dec. 10, 1912.

2 SHEETSSHBET 1.

{7/ itii d Jed. Ellen)?! A J. 0v Zirnmick J. O. DIMMIUH.

ELECTRIC HEATING DEVICE.

' APPLlGATION FILED 1.43.16, 1912.

1,047,094, latwta-Mka BEEF/i.

Z SHBETSw-SEBET Z wo'i'nedaedl UNITED STATES PATENT OF ICE JOSEPH-o. DIMMICK, or LOS ANGELES, CALIFORNIA, ASSIGNOR To ELECTRIC, 3E4! cousmwmc COMPANY, or LOS ANGELES, CALIFORNIA, A CRPORATIQ N OF CALIFORNIA.

7 '0 all whom. it may concern:

Be it known that I, Josnrn 0. Duration,

a citizen of the United States, and resident of'Los Angeles, 111 the county at Los Angeles and State of Cahtorma, have lnvented .heater which has certain peculiar features and advantages not possessed by heaters in the class to which this pertains.

The object of my invention is to provide an electric heater which has a heat conservint, means, whereby the heat may-be retamed for a long period after the heating current has been cut oil, and to accomplish this, I provide an electric resistance of suitable material which is placed within, or surrounded by a heat retaining substance, as

. for instance soapstone, which is known to retain heat for an indefinite period and in then surfroumling or partially surrounding this heat retaining suliistance with a body of water to receive the heat of the electric element.

The.dissymmetric diti'usion of" heat from an electric heating element as usually employed is not only a wasteful manner of utilizing a.currcnt, when it. is in circuit, but

- there is no means of conserving the heat.

One of my objects is to provide a means whereby a body of water may be heated not only by radiation and convection during the period when the current is being used, but for an indefinite time after the current. is cut otl', and to this end the electric heating element does not apply the heat directly to the water but to a substance specially employed on account of its heat retaining qualities so that the time element may be employed in imparting the heat thus conserved. so that. the heater is thus specially adapted for use in the sick room or for other purposes where it is not. convenient or desirable to use the current at, frequent intervals, all of which will now be set. forth in detail.

In the accompanying: drawings, Figure l is .a central vertical section of my electric hea er adapted for the lb! of heating a body of water. Fig. 2 is a top view of the heater. Fig. 3 is a horizontal section on ine 3 of Fig. 1. Fig. 4 is a' horizontal section in ELECTRIC HEATING DEVICE.

Specification of Letters Patent. Application filed .Tanuaxy 1'6, 1912 Serial No. 672,007.

wilhout loss.

Patented Dec. 10,1212.

line 4 of Fig. 1, and Fig. 5 is a top view of the heater base.

In constructing my device I; iprovide abase of any suitable size and shape, preferably of cast-"metal, 6, as shown in this instance, circular in form, with therentral part thereof ra1sed to form -"a platform 7. Centrally on this platform is an integral raisedcircular rim 8', with a centra ripening, within which is placed an electric heating or resistance COll 9. On the circulari;

rim 8 thus formed is mounted a vertical cylirulrical body 10, preferably of soapstone, or other suitable heat. retaining material. This soapstone body has a central bore adapted to receive therein an electric heating element. 11, such as carbon or other material usually employed for this purpose. One circuit terminal '12 connects with the lower end of this heating element 11, as shown at 13, and the other end of this element is connected as at- 14, to a Wire 15 which passcs thrt-mgh a bore in the soapstone body and joins one side of the coil 9. The other side of the coil 9 has its wire connected up withthe other circuit terminal 16,

so that the current 'will thus llow in seriesthrough the coil and 'hcatine element. I therefore provide two separate heating elements, one within the body of the soapstone. and the other below the soapstone, the object. being to not only have a. means for directly heating the heatretaining body 10, but also to heat.- the base, and particularly to afi ord a separate and independent: heating 1neans.for the lower end of the water jacket.

Surrounding the soapstone body 10, is a cylindrical shell 17. the said shell being removed a sullicient. distance from the body to permit of an inner shell 18 which is in-contact with the soapstone body to form, together with the outer shell, :1 space H so that water will thus surround the soapstone body A partition wall 20 above the body serves to form a cham er 21 above the body, thereby int-losing the heat retaining element in such a. manner that all the heat will 'be readily conveyed to the water This water cylinder is detachably secured to the. base, and T. prefer to make the attachment: by mcans'o't a pair of hooked lingers 22. which extend down from the end of the cylinder and are adapted to enter the enlarged openings 93 of the .place to place.

' "It will thus be seen that when a current of electricity is conveyed-through't-he elements the heatsetup is imparted to the heat retaining element, as the intermediary between the heating elements and the water, and this reservoir of heat, thus a plied, substantially within the body of the water, will gradually give off its heat, as radiation takes place from the water, and thereby also enabling me to provide a means whereby I may use a smaller quantity; of water than if Iv'should use the same quantity as the soapstone occupies, and thus afford a means wherebyI can heat'up the water in 8;;leSS

time than would be possible with a large body of ,water, and' at the same time give a longer range of heating act-ion.

1 80 It is obvious that'I may modify the re sistance coil or equip the. heater with any form: or type of electric mechanism without departing from thespiritof my invention, which resides inthe use of a-heat retairnng element within a body' of water,

ada ted to. directly receive theelectri'c heat conection set up by; thg current. a

1 What I claim as Deng-is:

1. A-heater, comprisin .a base, a heat retaining element remova lyattached to'said base, all electric heating element within said heat retaining element, a liqhid containing shell surrounding the heat-retaining ele-' ment, and 'removably attached to said base,

and a separate heating means below the aforesaid heating element.

2. In a heater, a base, an electric heating element'and a heat-retaining element de': tachably secured to said base, a shell for receiving heat from the heat-retaining element, also detachably secured to the'base,

said base, having a shell thereon,'and a heating coil within said shell.

3. In a heater, a base, a shellon the base adapted to receive therein an electric heating coil, an electric heating element within the heat retaining element electrically con nected with said heating coil, and a jacketed water. space surrounding the coil at the base and the heat retaining element above the base.

fco

- 4. In a heater, a base, a shell on said base adapted to recei e an electric heating .coil, a heat-retaining element above the'heating' coil, an electric heating elemcnt"ax1ally.

on' top of the water shell.

' within the heat-retaining element, and elec-. trically connected with the heating coil, a water-containing shell surrounding and sur mounting the heat-retaining element, a ran:

cet at the base of the water shell, a fittin -7O tube at the top, and a removable lid or gri Signed at the city of-Los Angeles', county of Los Angeles, State of Cahfornia, this 20th day ofDecember, 1911, in the presence of witnesses.

Witnesses:

J. S. ZERBE, GEO. BURDE'IT.

JOSEPH o. D IMMIoKJI, 

